Build fail with Mac OS X (Yosemite, gcc 4.9 from homebrew with openMP, open CV, Blas)

[phunterlau]

After following the build instruction by checking out the latest mxnet recursively, and installing c++, open cv, open blas, make gives this error on isnan in the ndarray_function from mshadow (latest mxnet commit 6155880 ):

g++ -std=c++0x -DMSHADOW_FORCE_STREAM -Wall -O3 -I./mshadow/ -I./dmlc-core/include -fPIC -Iinclude -msse3 -funroll-loops -Wno-unused-parameter -Wno-unknown-pragmas -DMSHADOW_USE_CUDA=0 -DMSHADOW_USE_CBLAS=1 -DMSHADOW_USE_MKL=0 -DMSHADOW_RABIT_PS=0 -DMSHADOW_DIST_PS=0 -DMXNET_USE_OPENCV=1 -fopenmp  -MM -MT build/ndarray/ndarray.o src/ndarray/ndarray.cc >build/ndarray/ndarray.d
g++ -std=c++0x -c -DMSHADOW_FORCE_STREAM -Wall -O3 -I./mshadow/ -I./dmlc-core/include -fPIC -Iinclude -msse3 -funroll-loops -Wno-unused-parameter -Wno-unknown-pragmas -DMSHADOW_USE_CUDA=0 -DMSHADOW_USE_CBLAS=1 -DMSHADOW_USE_MKL=0 -DMSHADOW_RABIT_PS=0 -DMSHADOW_DIST_PS=0 -DMXNET_USE_OPENCV=1 -fopenmp  -c src/ndarray/ndarray.cc -o build/ndarray/ndarray.o
In file included from src/ndarray/ndarray.cc:13:0:
src/ndarray/./ndarray_function.h: In static member function 'static mxnet::real_t mxnet::ndarray::Clip::mshadow_op::Map(mxnet::real_t, mxnet::real_t)':
src/ndarray/./ndarray_function.h:43:18: error: 'isnan' was not declared in this scope
       if (isnan(a)) return 0.0f;
                  ^
src/ndarray/./ndarray_function.h:43:18: note: suggested alternative:
In file included from /usr/local/Cellar/gcc49/4.9.3/include/c++/4.9.3/random:38:0,
                 from /usr/local/Cellar/gcc49/4.9.3/include/c++/4.9.3/bits/stl_algo.h:66,
                 from /usr/local/Cellar/gcc49/4.9.3/include/c++/4.9.3/algorithm:62,
                 from ./dmlc-core/include/dmlc/./parameter.h:18,
                 from ./dmlc-core/include/dmlc/registry.h:14,
                 from src/ndarray/ndarray.cc:8:
/usr/local/Cellar/gcc49/4.9.3/include/c++/4.9.3/cmath:632:5: note:   'std::isnan'
     isnan(_Tp __x)
     ^
In file included from src/ndarray/ndarray.cc:8:0:
src/ndarray/ndarray.cc: At global scope:
./dmlc-core/include/dmlc/registry.h:194:22: warning: 'mxnet::__make_NDArrayFunctionReg__set_value__' defined but not used [-Wunused-variable]
   static EntryType & __make_ ## EntryTypeName ## _ ## Name ## __ =      \
                      ^
include/mxnet/ndarray.h:580:3: note: in expansion of macro 'DMLC_REGISTRY_REGISTER'
   DMLC_REGISTRY_REGISTER(::mxnet::NDArrayFunctionReg, NDArrayFunctionReg, name)
   ^
src/ndarray/ndarray.cc:508:1: note: in expansion of macro 'MXNET_REGISTER_NDARRAY_FUN'
 MXNET_REGISTER_NDARRAY_FUN(_set_value).set_function(SetValueOp);
 ^

Can you suggest some fix so I can test on my mac? Thanks.

[antinucleon]

trystd::isnan?

[tqchen]

add using namespace std should work, @antinucleon I think we want to remove isnan check

[tqchen]

We cannot do std::isnan because that code is supposed to run on CUDA as well

[antinucleon]

k...will remove nan check

[mli]

that happens before. Can we auto pick the right isnan based on the device?

[antinucleon]

I removed isnan already
On Fri, Oct 9, 2015 at 00:51 Mu Li [email protected] wrote:

that happens before. Can we auto pick the right isnan based on the device?

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#192 (comment).

[pluskid]

Also just a side note for OSX compilation: if we add -I/System/Library/Frameworks/Accelerate.framework/Versions/Current/Frameworks/vecLib.framework/Versions/Current/Headers/ to ADD_CFLAGS then there is no need to install third-party BLAS.

[tqchen]

Yes, this is already enabled by setting USE_BLAS=apple @antinucleon We should add that in build note for OSX

[pluskid]

@tqchen Thanks! Good to know that. I think it is definitely good to have recommended ways of installing the dependency packages on Linux and OS X separately in the INSTALL document.

[phunterlau]

@pluskid After upgrading to El Capitan, this default BLAS from apple has just gone, if you need BLAS, don't upgrade :-) Meanwhile, I am trying to find a way to have BLAS in the new system

[pluskid]

@phunterlau I still have them in the original place after upgrading to EI Capitan.

[mli]

my suggestion is USE_BLAS=AUTO in default

if osx, then set it to apple, otherwise probably just blas, or auto check what is available.

[pluskid]

I second the idea for "auto" BLAS. I saw cmake related stuff in the repo recently. Are we going to switch to cmake soon?

[tqchen]

the cmake is already ready to use. I think we will keep both approaches ,
both Makefile and cmake. Cmake is good for windows and being auto in
choosing libs. Except that itself is a dependency.
On Sat, Oct 10, 2015 at 11:38 AM Chiyuan Zhang [email protected]
wrote:

I second the idea for "auto" BLAS. I saw cmake related stuff in the repo
recently. Are we going to switch to cmake soon?

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#192 (comment).

[phunterlau]

fixed my local BLAS installation from upgrading to El Capitan. Compiled and tested OK after fixing nan problem. I am trying to finish the pip installation soon.